What kind of fish do well in backyard ponds? We have a pond with a fountain in our backyard, and I want to get some fish, or something similar to put in it. I would like a few medium-large colorful fish that stand out against black. They need to be able to stand cold weather. We live in the south, but we do get the occasional freeze. The pond never freezes over, but it does get cold. It stays cool in the summer. I'm not sure how many gallons it is, but it's at least 100. If not fish, then maybe algae eaters or ghost shrimp? We've only had small goldfish in it before and they never made it more than a couple of months so I wanted to try something new. Anyone have success with keeping fish in their outside ponds?